Method for producing graphene modified carbon negative material for power lithium ion battery

The invention provides a method for producing a graphene modified carbon negative material for a power lithium ion battery. The method comprises the following steps of: taking mesophase pitch as a raw material A, then taking graphene as a modifying agent B for modification, and mixing the two raw materials A and B at a high speed for 2-5 hours according to a certain weight ratio to obtain a material C; carrying out oxidation treatment on the material C at the temperature of 200-260 DEG C for 3-5 hours to obtain a material D; taking a solvent used for a lithium battery as a raw material E, carrying out liquid-phase mixing stirring treatment on the material D subjected to the oxidation treatment according to a certain volume ratio by using the lithium battery solvent, spray-drying into a sphere at 500-1300 DEG C, and carrying out graphitization treatment at the temperature of 2400-3200 DEG C after spheroidizing; finally screening and packaging a graphitized material to finally obtain a product. The product provided by the invention has the advantages of good low-temperature property and stability in circulating property.